package com.lagou.rpc.provider.server;

import com.lagou.rpc.common.*;
import com.lagou.rpc.provider.handler.RpcServerHandler;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

/**
 * 启动类
 */
@Service
public class RpcServer implements DisposableBean {
    private NioEventLoopGroup bossGroup;
    private NioEventLoopGroup workerGroup;

    @Autowired
    RpcServerHandler rpcServerHandler;

    public void startServer(String ip, int port) {
        try {
            //1.创建线程组
            bossGroup = new NioEventLoopGroup(1);
            workerGroup = new NioEventLoopGroup();
            //2.创建服务端启动助手
            ServerBootstrap serverBootstrap = new ServerBootstrap();

            //3.设置参数
            serverBootstrap.group(bossGroup, workerGroup)
                    .channel(NioServerSocketChannel.class)
                    .childHandler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        protected void initChannel(SocketChannel socketChannel) throws Exception {
                            ChannelPipeline pipeline = socketChannel.pipeline();
                            //添加String类型的编解码器
//                            pipeline.addLast(new StringDecoder());
//                            pipeline.addLast(new StringEncoder());
                            //TODO 添加自定义编解码器
                            pipeline.addLast(new RpcDecoder(RpcRequest.class,new JSONSerializer()));
                            pipeline.addLast(new RpcEncoder(RpcResponse.class,new JSONSerializer()));
                            //添加业务处理类
                            pipeline.addLast(rpcServerHandler);
                        }
                    });
            //绑定端口
            ChannelFuture sync = serverBootstrap.bind(ip, port).sync();
            System.out.println("==========服务端启动成功============");
            sync.channel().closeFuture().sync();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (bossGroup != null) {
                bossGroup.shutdownGracefully();
            }
            if (workerGroup != null) {
                workerGroup.shutdownGracefully();
            }
        }


    }


    /**
     * 容器关闭时触发销毁方法
     *
     * @throws Exception
     */
    @Override
    public void destroy() throws Exception {
        if (bossGroup != null) {
            bossGroup.shutdownGracefully();
        }
        if (workerGroup != null) {
            workerGroup.shutdownGracefully();
        }
    }
}
